ZOIC Square Insert Stainless Steel Floor Waste Grates Shower Drain 5.9x5.9 Inches Two stainless steel design grate options: closed design or Frameless tileable (Frameless tileable covering support provides virtually.invisible drainage; suitable for any thickness tile) Installs independently of all waterproofing materials and procedures Install at walls or intermediate locations Slope floor on single plane and incorporate large-format tile Creates the alluring illusion of water vanishing into the floor